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teespring-font-face-observer
Advanced tools
Readme
Font Face Observer is a small @font-face
loader and monitor compatible with any web-font service. It will monitor when a web font is applied to the page and notify you. It does not limit you in any way in where, when, or how you load your web fonts. Unlike the Web Font Loader Font Face Observer uses scroll events to detect font loads efficiently and with minimum overhead.
Include your @font-face
rules as usual. Fonts can be supplied by either a font service such as Google Fonts, Typekit, and Webtype or be self-hosted. It doesn't matter where, when, or how you load your fonts. You can set up monitoring for a single font family at a time:
var FontFaceObserver = require('font-face-observer');
var observer = new FontFaceObserver('My Family', {
weight: 400
});
observer.check().then(function () {
console.log('Font is available');
}, function () {
console.log('Font is not available');
});
The FontFaceObserver
constructor takes two (required) arguments: the font family name and an object describing the variation. The object can contain weight
, style
, stretch
, variant
, and featureSettings
properties. If a property is not present it will default to normal
. To start observing font loads, call the check
method. It'll immediately return a new Promise that resolves when the font is available and rejected when the font is not available.
If your font doesn't contain latin characters you can pass a custom test string to the check
method.
var FontFaceObserver = require('font-face-observer');
var observer = new FontFaceObserver('My Family', {});
observer.check('中国').then(function () {
console.log('Font is available');
}, function () {
console.log('Font is not available');
});
The default timeout for giving up on font loading is 3 seconds. You can increase or decrease this by passing a number of milliseconds as the second parameter to the check
method.
var FontFaceObserver = require('font-face-observer');
var observer = new FontFaceObserver('My Family', {});
observer.check(null, 5000).then(function () {
console.log('Font is available');
}, function () {
console.log('Font is not available after waiting 5 seconds');
});
FontFaceObserver has been tested and works on the following browsers:
FontFaceObserver is licensed under the BSD License. Copyright 2014-2015 Bram Stein. All rights reserved.
FAQs
Font face observer for eventing when web fonts are loaded
We found that teespring-font-face-observer demonstrated a not healthy version release cadence and project activity because the last version was released a year ago. It has 1 open source maintainer collaborating on the project.
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